Google, Mozilla, and enterprise software disruption

Who would you work for if not for the company that currently employs you?

For many right now this is a somewhat pointless question: with so many people unemployed, the answer is, "I'd work for anyone that could cut me a paycheck every other week."

Bad as things may be at present, however, they will get better. As the economy heats up, and it eventually will, which software companies are poised to make the biggest impact on the industry for the coming five, 10, and 50 years?

I asked this question over Twitter yesterday, and received some interesting replies. Google, Amazon, Canonical (Ubuntu), Red Hat, Mozilla (Firefox), Adobe, and Cisco were some of the replies.